시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
1 초 128 MB 2440 455 385 21.027%

문제

Java 예찬론자 김동규와 C++ 옹호가 김동혁은 서로 어떤 프로그래밍 언어가 최고인지 몇 시간동안 토론을 하곤 했다. 동규는 Java가 명확하고 에러가 적은 프로그램을 만든다고 주장했고, 동혁이는 Java는 프로그램이 느리고, 긴 소스 코드를 갖는 점과 제네릭 배열의 인스턴스화의 무능력을 비웃었다.

또, 김동규와 김동혁은 변수 이름을 짓는 방식도 서로 달랐다. Java에서는 변수의 이름이 여러 단어로 이루어져있을 때, 다음과 같은 방법으로 변수명을 짓는다. 

첫 단어는 소문자로 쓰고, 다음 단어부터는 첫 문자만 대문자로 쓴다. 또, 모든 단어는 붙여쓴다. 따라서 Java의 변수명은 javaIdentifier, longAndMnemonicIdentifier, name, bAEKJOON과 같은 형태이다.

반면에 C++에서는 변수명에 소문자만 사용한다. 단어와 단어를 구분하기 위해서 밑줄('_')을 이용한다. C++ 변수명은 c_identifier, long_and_mnemonic_identifier, name, b_a_e_k_j_o_o_n과 같은 형태이다.

이 둘의 싸움을 부질없다고 느낀 재원이는 C++형식의 변수명을 Java형식의 변수명으로, 또는 그 반대로 바꿔주는 프로그램을 만드려고 한다. 각 언어의 변수명 형식의 위의 설명을 따라야 한다.

재원이의 프로그램은 가장 먼저 변수명을 입력으로 받은 뒤, 이 변수명이 어떤 언어 형식인지를 알아내야 한다. 그 다음, C++형식이라면 Java형식으로, Java형식이라면 C++형식으로 바꾸면 된다. 만약 C++형식과 Java형식 둘 다 아니라면, 에러를 발생시킨다. 변수명을 변환할 때, 단어의 순서는 유지되어야 한다.

재원이는 프로그램을 만드려고 했으나, 너무 귀찮은 나머지 이를 문제를 읽는 사람의 몫으로 맡겨놨다.

재원이가 만드려고 한 프로그램을 대신 만들어보자.

입력

첫째 줄에 변수명이 주어진다. 영어 알파벳과 밑줄('_')로만 이루어져 있고, 길이는 100을 넘지 않는다.

출력

입력으로 주어진 변수명이 Java형식이면, C++형식으로 출력하고, C++형식이라면 Java형식으로 출력한다. 둘 다 아니라면 "Error!"를 출력한다.

예제 입력 1

long_and_mnemonic_identifier

예제 출력 1

longAndMnemonicIdentifier
[{"problem_id":"3613","problem_lang":"0","title":"Java vs C++","description":"<p>Java \uc608\ucc2c\ub860\uc790 \uae40\ub3d9\uaddc\uc640 C++ \uc639\ud638\uac00 \uae40\ub3d9\ud601\uc740 \uc11c\ub85c \uc5b4\ub5a4 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\uac00 \ucd5c\uace0\uc778\uc9c0 \uba87 \uc2dc\uac04\ub3d9\uc548 \ud1a0\ub860\uc744 \ud558\uace4 \ud588\ub2e4. \ub3d9\uaddc\ub294 Java\uac00 \uba85\ud655\ud558\uace0 \uc5d0\ub7ec\uac00 \uc801\uc740 \ud504\ub85c\uadf8\ub7a8\uc744 \ub9cc\ub4e0\ub2e4\uace0 \uc8fc\uc7a5\ud588\uace0, \ub3d9\ud601\uc774\ub294 Java\ub294 \ud504\ub85c\uadf8\ub7a8\uc774 \ub290\ub9ac\uace0, \uae34 \uc18c\uc2a4 \ucf54\ub4dc\ub97c \uac16\ub294 \uc810\uacfc \uc81c\ub124\ub9ad \ubc30\uc5f4\uc758 \uc778\uc2a4\ud134\uc2a4\ud654\uc758 \ubb34\ub2a5\ub825\uc744 \ube44\uc6c3\uc5c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\ub610, \uae40\ub3d9\uaddc\uc640 \uae40\ub3d9\ud601\uc740 \ubcc0\uc218 \uc774\ub984\uc744 \uc9d3\ub294 \ubc29\uc2dd\ub3c4 \uc11c\ub85c \ub2ec\ub790\ub2e4. Java\uc5d0\uc11c\ub294 \ubcc0\uc218\uc758 \uc774\ub984\uc774 \uc5ec\ub7ec \ub2e8\uc5b4\ub85c \uc774\ub8e8\uc5b4\uc838\uc788\uc744 \ub54c, \ub2e4\uc74c\uacfc \uac19\uc740 \ubc29\ubc95\uc73c\ub85c \ubcc0\uc218\uba85\uc744 \uc9d3\ub294\ub2e4.&nbsp;<\/p>\r\n\r\n<p>\uccab \ub2e8\uc5b4\ub294 \uc18c\ubb38\uc790\ub85c \uc4f0\uace0, \ub2e4\uc74c \ub2e8\uc5b4\ubd80\ud130\ub294 \uccab \ubb38\uc790\ub9cc \ub300\ubb38\uc790\ub85c \uc4f4\ub2e4. \ub610, \ubaa8\ub4e0 \ub2e8\uc5b4\ub294 \ubd99\uc5ec\uc4f4\ub2e4. \ub530\ub77c\uc11c Java\uc758 \ubcc0\uc218\uba85\uc740 <code>javaIdentifier<\/code>, <code>longAndMnemonicIdentifier<\/code>, <code>name<\/code>, <code>bAEKJOON<\/code>\uacfc \uac19\uc740 \ud615\ud0dc\uc774\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\ubc18\uba74\uc5d0 C++\uc5d0\uc11c\ub294 \ubcc0\uc218\uba85\uc5d0 \uc18c\ubb38\uc790\ub9cc \uc0ac\uc6a9\ud55c\ub2e4. \ub2e8\uc5b4\uc640 \ub2e8\uc5b4\ub97c \uad6c\ubd84\ud558\uae30 \uc704\ud574\uc11c \ubc11\uc904(&#39;<code>_<\/code>&#39;)\uc744 \uc774\uc6a9\ud55c\ub2e4. C++ \ubcc0\uc218\uba85\uc740 <code>c_identifier<\/code>, <code>long_and_mnemonic_identifier<\/code>, <code>name<\/code>, <code>b_a_e_k_j_o_o_n<\/code>\uacfc \uac19\uc740 \ud615\ud0dc\uc774\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\uc774 \ub458\uc758 \uc2f8\uc6c0\uc744 \ubd80\uc9c8\uc5c6\ub2e4\uace0 \ub290\ub080 \uc7ac\uc6d0\uc774\ub294 C++\ud615\uc2dd\uc758 \ubcc0\uc218\uba85\uc744 Java\ud615\uc2dd\uc758 \ubcc0\uc218\uba85\uc73c\ub85c, \ub610\ub294 \uadf8 \ubc18\ub300\ub85c \ubc14\uafd4\uc8fc\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \ub9cc\ub4dc\ub824\uace0 \ud55c\ub2e4. \uac01 \uc5b8\uc5b4\uc758 \ubcc0\uc218\uba85 \ud615\uc2dd\uc758 \uc704\uc758 \uc124\uba85\uc744 \ub530\ub77c\uc57c \ud55c\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\uc7ac\uc6d0\uc774\uc758 \ud504\ub85c\uadf8\ub7a8\uc740 \uac00\uc7a5 \uba3c\uc800 \ubcc0\uc218\uba85\uc744 \uc785\ub825\uc73c\ub85c \ubc1b\uc740 \ub4a4, \uc774 \ubcc0\uc218\uba85\uc774 \uc5b4\ub5a4 \uc5b8\uc5b4 \ud615\uc2dd\uc778\uc9c0\ub97c \uc54c\uc544\ub0b4\uc57c \ud55c\ub2e4. \uadf8 \ub2e4\uc74c, C++\ud615\uc2dd\uc774\ub77c\uba74 Java\ud615\uc2dd\uc73c\ub85c, Java\ud615\uc2dd\uc774\ub77c\uba74 C++\ud615\uc2dd\uc73c\ub85c \ubc14\uafb8\uba74 \ub41c\ub2e4. \ub9cc\uc57d C++\ud615\uc2dd\uacfc Java\ud615\uc2dd \ub458 \ub2e4 \uc544\ub2c8\ub77c\uba74, \uc5d0\ub7ec\ub97c \ubc1c\uc0dd\uc2dc\ud0a8\ub2e4. \ubcc0\uc218\uba85\uc744 \ubcc0\ud658\ud560 \ub54c, \ub2e8\uc5b4\uc758 \uc21c\uc11c\ub294 \uc720\uc9c0\ub418\uc5b4\uc57c \ud55c\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\uc7ac\uc6d0\uc774\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \ub9cc\ub4dc\ub824\uace0 \ud588\uc73c\ub098, \ub108\ubb34 \uadc0\ucc2e\uc740 \ub098\uba38\uc9c0 \uc774\ub97c \ubb38\uc81c\ub97c \uc77d\ub294 \uc0ac\ub78c\uc758 \ubaab\uc73c\ub85c \ub9e1\uaca8\ub1a8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\uc7ac\uc6d0\uc774\uac00 \ub9cc\ub4dc\ub824\uace0 \ud55c \ud504\ub85c\uadf8\ub7a8\uc744 \ub300\uc2e0 \ub9cc\ub4e4\uc5b4\ubcf4\uc790.<\/p>","input":"<p>\uccab\uc9f8 \uc904\uc5d0 \ubcc0\uc218\uba85\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. \uc601\uc5b4 \uc54c\ud30c\ubcb3\uacfc \ubc11\uc904(&#39;_&#39;)\ub85c\ub9cc \uc774\ub8e8\uc5b4\uc838 \uc788\uace0, \uae38\uc774\ub294 100\uc744 \ub118\uc9c0 \uc54a\ub294\ub2e4.<\/p>\r\n","output":"<p>\uc785\ub825\uc73c\ub85c \uc8fc\uc5b4\uc9c4 \ubcc0\uc218\uba85\uc774 Java\ud615\uc2dd\uc774\uba74, C++\ud615\uc2dd\uc73c\ub85c \ucd9c\ub825\ud558\uace0, C++\ud615\uc2dd\uc774\ub77c\uba74 Java\ud615\uc2dd\uc73c\ub85c \ucd9c\ub825\ud55c\ub2e4. \ub458 \ub2e4 \uc544\ub2c8\ub77c\uba74 &quot;Error!&quot;\ub97c \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"0","problem_lang_code":"\ud55c\uad6d\uc5b4"},{"problem_id":"3613","problem_lang":"1","title":"Java vs C++","description":"<p>Apologists of Java and C++ can argue for hours proving each other that their programming language is the best one. Java people will tell that their programs are clearer and less prone to errors, while C++ people will laugh at their inability to instantiate an array of generics or tell them that their programs are slow and have long source code.<\/p>\r\n\r\n<p>Another issue that Java and C++ people could never agree on is identifier naming. In Java a multiword identifier is constructed in the following manner: the first word is written starting from the small letter, and the following ones are written starting from the capital letter, no separators are used. All other letters are small. Examples of a Java identifier are <code>javaIdentifier<\/code>, <code>longAndMnemonicIdentifier<\/code>, <code>name<\/code>, <code>nEERC<\/code>.<\/p>\r\n\r\n<p>Unlike them, C++ people use only small letters in their identifiers. To separate words they use underscore character &lsquo;_&rsquo;. Examples of C++ identifiers are <code>c_identifier<\/code>, <code>long_and_mnemonic_identifier<\/code>, <code>name<\/code> (you see that when there is just one word Java and C++ people agree), <code>n_e_e_r_c<\/code>.<\/p>\r\n\r\n<p>You are writing a translator that is intended to translate C++ programs to Java and vice versa. Of course, identifiers in the translated program must be formatted due to its language rules &mdash; otherwise people will never like your translator.<\/p>\r\n\r\n<p>The first thing you would like to write is an identifier translation routine. Given an identifier, it would detect whether it is Java identifier or C++ identifier and translate it to another dialect. If it is neither, then your routine should report an error. Translation must preserve the order of words and must only change the case of letters and\/or add\/remove underscores.<\/p>","input":"<p>The input file consists of one line that contains an identifier. It consists of letters of the English alphabet and underscores. Its length does not exceed 100.<\/p>\r\n","output":"<p>If the input identifier is Java identifier, output its C++ version. If it is C++ identifier, output its Java version. If it is none, output &ldquo;Error!&rdquo; instead.<\/p>\r\n","hint":"","original":"1","problem_lang_code":"\uc601\uc5b4"}]